43608769 has 4 divisors (see below), whose sum is σ = 43627140. Its totient is φ = 43590400.

The previous prime is 43608749. The next prime is 43608787. The reversal of 43608769 is 96780634.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19254544 + 24354225 = 4388^2 + 4935^2 .

It is a cyclic number.

It is not a de Polignac number, because 43608769 - 2⁵ = 43608737 is a prime.

It is a super-2 number, since 2×43608769² = 3803449467390722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43608749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4984 + ... + 10585.

It is an arithmetic number, because the mean of its divisors is an integer number (10906785).

Almost surely, 2^43608769 is an apocalyptic number.

It is an amenable number.

43608769 is a deficient number, since it is larger than the sum of its proper divisors (18371).

43608769 is a wasteful number, since it uses less digits than its factorization.

43608769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18370.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 43608769 is about 6603.6935876826. The cubic root of 43608769 is about 351.9853670957.

The spelling of 43608769 in words is "forty-three million, six hundred eight thousand, seven hundred sixty-nine".